Why is the core in a transformer is laminated
The core in a transformer is laminated to reduce eddy current losses. Eddy currents are small circulating currents that are induced in the core material due to the changing magnetic field in the transformer. These eddy currents generate heat and waste energy, which can reduce the efficiency of the transformer.
By laminating the core, the core is divided into thin layers or laminations, which are insulated from each other. This reduces the size of the eddy currents that can flow in the core, as the current has to flow through the thin layers, which have a high resistance to the flow of current. This reduces the amount of heat generated and energy wasted, making the transformer more efficient.
Additionally, laminating the core also reduces the noise generated by the transformer, as the laminations help to reduce the vibration of the core caused by the alternating magnetic field.